Ethernet Virtualization Using Hardware Control Flow Override

1. A method of Ethernet virtualization using hardware control flow override, the method comprising: providing, at a first logical entity of a first programmable logic device, a control signal used for performing control-flow; generating, from the first logical entity of the first programmable logic device, a first output signal; responsive to the control signal selecting an override mode, performing a through c comprising: a) routing the first output signal to a second programmable logic device that is external to the first programmable logic device; b) based on the first output signal, generating, from the second programmable logic device, a second output signal; and c) forwarding the second output signal to a second logical entity of the first programmable logic device; and responsive to the control signal not selecting an override mode, forwarding the first output signal to the second logical entity of the first programmable logic device.